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Thermoperiods and soil temperatures as they affect growth and dormancy of Douglas-fir seedlings of different geographic origin

Creator:

Lavender, Denis P., Overton, W. Scott, and Oregon State University. Forest Research Laboratory

Abstract:

The effects of a range of thermoperiods and soil temperatures upon growth of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were studied. The seeds, of varieties glauca and menziesii, came from eight widely separated areas. Plants from both varieties made maximum growth with soil and air temperatures between 18 and 24...

Resource Type:

Technical Report

Full Text:

, and no paper reports a systematic study of the effects of the range in thermoperiod, soil temperature
Subsurface heating and irrigation of soils: its effect on temperature and water content and on plant growth

Creator:

Barlow, Edward William Ross, Sepaskhah, Ali Reza, and Boersma, L.

Resource Type:

Technical Report

Full Text:

Temperature 16 Conclusions % 1 8 EXPERIMENTAL ANALYSIS OF SUBSURFACE SOIL WARMING AND IRRIGATION 2 1